A pocket shared with keys, cables and coins is a dangerous commute for glass, yet that is exactly where a high-end audio player spends its days. FiiO, a favourite among audiophiles, builds hi-res digital audio players, DACs and portable amps that put studio-grade sound in that pocket, many with generous touchscreens. A FiiO screen protector made to the exact panel keeps the damage away: shock-absorbing layers for daily carry, privacy filters for library browsing on the train, smudge-resistant finishes for constant track-skipping and crystal-clear versions that never distract from the design.